Iron, You're so Fine

The method of heat treatment for conventional grey, ductile cast irons and low alloy structural steels provides refinement and homogenization of their...

The method of heat treatment for conventional grey, ductile cast irons and low alloy structural steels provides refinement and homogenization of their microstructures together with over threefold increase of the impact resistance at a strength conservation. The method may be realized in the course of cooling after the optimal or high-temperature austenizing. The same finishing effects may be also obtained in the course of reheating the above type alloys from the room temperature after the previously conducted austenitizing with corresponding full cooling. Under both method realization variants, the furnace isothermal holding parameters are the same. The method may be employed in manufacturing an industrial product by the traditional mould and continuous casting, hot deformation, thermo-mechanical treatment, depositing, additive manufacturing etc. to obtain required microstructures and properties right away after the cycle finishing. The invented effects are conserved after any further additional heat treating including new high temperature austenitizing.